[DML] Re: Alternator Light - question
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[DML] Re: Alternator Light - question

It's not a "command signal" in the manner you imply. An alternator 
requires an electrical current through the copper windings before it 
will begin to output electricity. For instance, you couldn't just spin 
the altnerator by hand to charge a dead battery. The windings need to 
have a current passed through them first. The dummy light acts as a 
resistive load that accomplishes that.

You could just as easily install a small resistor in place of the dummy 
light to achieve the same effect of "starting" the alternator. Speaking 
of which, I know a lot of people have been replacing all of their dash, 
door and marker lights with LED's. If you replace the alternator dummy 
light with an LED, you'll need to install a resistor in-line with the 
LED because an LED is not enough of a resistive load to charge the 
alternator windings.

I'm sure that this has been covered in the archives.

Rich A.

--- In dmcnews@xxxxxxxxxxxxxxx, "daviddelorean" <daviddelorean@...> 
> Is there any truth to the theory that the light bulb in your 
> alternator tell tale light actually is responsible for "telling" your 
> alternator to begin generating power? I read this somewhere online 
> can't figure it out.

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